Polarization measurements from a rotating disc electrode for characterization of magnesium corrosion
| Autor: | Omer Van der Biest, Iñigo Marco |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Horizontal scan rate
Chemistry Magnesium 020209 energy General Chemical Engineering Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Anode Catalysis Corrosion Cathodic protection Electrode 0202 electrical engineering electronic engineering information engineering General Materials Science 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Corrosion Science. 102:384-393 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2015.10.031 |
| Popis: | Degradation of pure Mg is characterized by potentiodynamic polarization using a rotating disc electrode (RDE) where the Mg sample is placed. The rotation makes a fluid flow which removes dissolved Mg2+ from the Mg surface surrounding reducing the corrosion layer precipitation. This reduces the influence of corrosion products which accelerate the cathodic activity during anodic polarization. The results are in agreement with the enhanced catalytic surface theory. The use of the RDE gives highly reproducible results at higher rotation speeds than 1500 rpm and the scan rate does not have any influence on consecutive polarisations when higher than 5 mV/s. |
| Databáze: | OpenAIRE |
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